Background image optimization

jbernabeu

I would like to know the best way to have the background for iPhone 6 Plus ... the internal screen resolution is 2208x1242 so if I have an image that it is that size in memory it would be too big, isn't it?

How are you saving this kind of backgrounds ????

TTStu

Hi, I'm currently "tweaking" things for the new devices.

I'm gonna have an @3x atlas (which Daniel said in another thread should be automatically picked up by Sparrow).

In that @3x atlas I have an iPhone 6 Plus background image that is 2944 x 1656 (I build all my stuff at @4x ready for Texture Packer).

Then when generating the atlas for @3x I set it to 0.75 size, which results in the 2208 x 1242 background in the atlas.

I am going on the assumption that iPhone 6 Plus can handle 4096 x 4096 texture sizes, because otherwise that would be pretty bizarre.

Now, my problem is that including backgrounds for all devices in the @2x atlas (iPhone 4, iPhone 5, iPhone 6 regular and iPad regular) "busts" my atlas sizes bigger than 2048 x 2048 (which is a limit of iPhone 5 and less) so I'm currently deciding how to wrap these up for distribution.

Might take backgrounds out of the atlas and save them individually, which means I'd always have 2 textures in memory (one background and one UI) - not sure though.

Anyone else got any ideas on this?

TTStu

Fun Fact: The damn thing works @2X on my iPhone 5 even though the atlas is 2048 x 4096... no idea why!

EDIT: But doesn't work on iPhone 4, so that means iPhone 5 actually does support 4096 x 4096.

Not that it matters, still gotta reduce to 2048 x 2048...

jbernabeu

You have all your stuff in just one atlas. Is it better to have a 2048 x 2048 atlas than having a 1024x1024 and the background in other file?

TTStu

From a texture swapping perspective, yes.

jbernabeu

And from a memory perspective ???

TTStu

About the same given 1 atlas and 1 background.

eg no difference worth paying attention to.